Study to Assess Mechanisms in Peripheral Tissue Innervation for Fibromyalgia

Subjects will be titrated onto Duloxetine over one week by taking 30 mg every day for seven days. Week 2 the subject will begin to take 60 mg per day until the end of the study. If the subject wishes to stop taking Duloxetine, she will be given 30 mg per day for one week for down titration.

3 mm skin biopsies will be obtained from the dominant trapezius and the glabrous hypothenar area of the hand